count (integer or array_like) – the number of successes in nobs trials. If this is array_like, then
the assumption is that this represents the number of successes for
each independent sample

nobs (integer) – the number of trials or observations, with the same length as
count.

upp (low,) – equivalence interval low < prop1 - prop2 < upp

prop_var (string or float in (0, 1)) – prop_var determines which proportion is used for the calculation
of the standard deviation of the proportion estimate
The available options for string are ‘sample’ (default), ‘null’ and
‘limits’. If prop_var is a float, then it is used directly.